$ git clone -n https://src.fedoraproject.org/rpms/jackson-bom.git /var/lib/mock/f40-build-2274946-55042/root/chroot_tmpdir/scmroot/jackson-bom
Cloning into '/var/lib/mock/f40-build-2274946-55042/root/chroot_tmpdir/scmroot/jackson-bom'...
$ git fetch origin b1893454a6139a281859e2d870a4993a6b3c1197:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jackson-bom
 * [new ref]         b1893454a6139a281859e2d870a4993a6b3c1197 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b189345 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild